Influence of different irrigation regimes on crop yield and water use efficiency of olive

Fernandes-Silva, Anabela; Ferreira, Timóteo C.; Correia, Carlos M.; Malheiro, Aureliano C.; Villalobos, Francisco J.

doi:10.1007/s11104-010-0294-5

Cited by 79 publications

(58 citation statements)

References 42 publications

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“…The dominance of fruit number as the parameter that determines oil production (Table 5) is due to the amount of mesocarp developed by a tree (Lavee and Wodner 2004). It has also been observed in other irrigation experiments (Ben-Gal et al 2011;Correa-Tedesco et al 2010;Fernandes-Silva et al 2010;Moriana et al 2003). …”

Section: Oil Yield In Relation To Irrigationsupporting

confidence: 57%

Summer deficit-irrigation strategies in a hedgerow olive orchard cv. ‘Arbequina’: effect on fruit characteristics and yield

Gómez-del-Campo

2011

Irrig Sci

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Maximum production in hedgerow olive orchards is likely not achieved with maximum evapotranspiration over the long-term. Thus, regulated deficit irrigation (RDI) should be considered as a management option. Four irrigation treatments were evaluated during the summer when olive is most drought resistant. Control (CON) was irrigated to maintain the rootzone close to field capacity. Severe water deficit was applied by irrigating 30% CON from end of fruit drop to end July (DI-J) and from end July until beginning of oil synthesis (DI-A). Less severe water deficit was applied during July and August (DI-JA) by irrigating 50% CON. Flowering, fruiting, abscission, fruit development, fresh and dry weight of fruits, and oil production were evaluated. There were not significant differences in number of buds initiated, number of fruits per inflorescence and fruit drop. Oil production was significantly different between irrigation treatments in all experimental years. CON produced more oil and fruit with higher oil% than DI-A and DI-JA. Oil production of DI-J was not significantly reduced compared to CON and oil% was greater. DI-J was the most effective RDI strategy; with 16% less applied water relative to CON average loss in oil production of 8% was not significantly different to CON. While DI-JA saved most water (27%), oil production was reduced by 15%. Greatest loss in oil production (21%) was observed in DI-A with water saving of 22%.

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Section: Oil Yield In Relation To Irrigationsupporting

confidence: 57%

Summer deficit-irrigation strategies in a hedgerow olive orchard cv. ‘Arbequina’: effect on fruit characteristics and yield

Gómez-del-Campo

2011

Irrig Sci

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“…Dry and hot atmospheric conditions were observed during the campaigns where values of Rsi, T a , RH, u and vapor pressure deficit (VPD) ranged between 801-901 W m´2, 18.1-24.7˝C, 28.4%-54.2%, 1.0-2.7 m s´1, and 0.80-1.4 kPa, respectively. Within these atmospheric environments, values of Ψ x ranged betweeń 1.5 and´2.1 MPa indicating that the drip-irrigated olive orchard was maintained under non and moderate water stress conditions during the study period [8,53].…”

Section: Resultsmentioning

confidence: 99%

“…Lack of closure may be associated to errors in the measurements of Rn and G [58][59][60], energy storage within the olive tree biomass [61], low wind speed [62] and heterogeneity of surface energy balance of the region [63]. Finally, [53,64] suggested that EC uncertainties can be corrected using the Bowen-ratio approach (β = H/LE). 8 At the time of UAV overpass (near solar noon), Table 2 indicates that total bulk β above the soilcanopy system varied between 2.61 and 4.11 with maximum values observed on DOY 69.…”

Section: Resultsmentioning

confidence: 99%

Estimation of Energy Balance Components over a Drip-Irrigated Olive Orchard Using Thermal and Multispectral Cameras Placed on a Helicopter-Based Unmanned Aerial Vehicle (UAV)

et al. 2016

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A field experiment was carried out to implement a remote sensing energy balance (RSEB) algorithm for estimating the incoming solar radiation (Rsi), net radiation (Rn), sensible heat flux (H), soil heat flux (G) and latent heat flux (LE) over a drip-irrigated olive (cv. Arbequina) orchard located in the Pencahue Valley, Maule Region, Chile (35˝25 1 S; 71˝44 1 W; 90 m above sea level). For this study, a helicopter-based unmanned aerial vehicle (UAV) was equipped with multispectral and infrared thermal cameras to obtain simultaneously the normalized difference vegetation index (NDVI) and surface temperature (T surface ) at very high resolution (6 cmˆ6 cm). Meteorological variables and surface energy balance components were measured at the time of the UAV overpass (near solar noon). The performance of the RSEB algorithm was evaluated using measurements of H and LE obtained from an eddy correlation system. In addition, estimated values of Rsi and Rn were compared with ground-truth measurements from a four-way net radiometer while those of G were compared with soil heat flux based on flux plates. Results indicated that RSEB algorithm estimated LE and H with errors of 7% and 5%, respectively. Values of the root mean squared error (RMSE) and mean absolute error (MAE) for LE were 50 and 43 W m´2 while those for H were 56 and 46 W m´2, respectively. Finally, the RSEB algorithm computed Rsi, Rn and G with error less than 5% and with values of RMSE and MAE less than 38 W m´2. Results demonstrated that multispectral and thermal cameras placed on an UAV could provide an excellent tool to evaluate the intra-orchard spatial variability of Rn, G, H, LE, NDVI and T surface over the tree canopy and soil surface between rows.

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“…The experimental layout consisted of three adjacent blocks each of these made of four rows with twenty olives trees, where only the six central trees were used for sampling. Additional information about climatic conditions, amount of water applied, irrigation water quality and soil properties may be found in Fernandes-Silva et al (2010).…”

Section: Study Site and Experimental Conditionsmentioning

confidence: 99%

“…Detailed information about the measurement of shoot water potential has been reported in a previous work (Fernandes-Silva et al, 2010).…”

Section: Study Site and Experimental Conditionsmentioning

confidence: 99%

Effect of different irrigation regimes on the quality attributes of monovarietal virgin olive oil from cv. “Cobrançosa”

Silva

Gouveia²,

Vasconcelos³

et al. 2013

Grasas y Aceites

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RESUMEN Efecto de diferentes regímenes de riego sobre los índices de calidad del aceite de oliva de cv. "Co brançosa"El objetivo del estudio fue evaluar el efecto de distintas estrategias de riego en la composición y la calidad del aceite de oliva virgen de cv. Cobrançosa, integrado en una denominación de origen protegida de «Azeite de Trás-osMontes», en el noreste de Portugal. Tres tratamientos de riego fueron aplicados: T2-riego total, el olivo recibió el equivalente estacional de agua al 100% de la evapotranspiración estimada del cultivo (ETc), T1-riego continuo deficitario (30% de la ETc) y el tratamiento T0-de secano. Los datos fueron recolectados a partir de dos campañas agrícolas consecutivas (2005)(2006). Los regímenes de riego tuvieron un efecto menor en los índices de calidad estándar (ácidos grasos libres, índice de peróxidos, K 232 y K 270 ) del aceite de oliva y en la composición de ácidos grasos. Los polifenoles totales disminuyeron hasta el tratamiento T2, y se relacionaron fuertemente con el integral de estrés hídrico, lo que sugiere que el efecto del riego sobre esta variable se produce a lo largo de la temporada de cultivo y no sólo durante la fase de acumulación de aceite. Una estrategia de riego deficitario continuo con sólo 30% de la ETc máxima puede tener un efecto beneficioso, ya que aumentó la producción de aceite de oliva a más del doble que en condiciones de secano, mientras que la calidad del aceite de oliva fue similar. PALABRAS CLAVE: Aceite de oliva virgen -cv. Cobrançosa -Índices de calidad -Riego. ABSTRACT Effect of different irrigation regimes on the quality attributes of monovarietal virgin olive oil of cv. "Cobrançosa"The aim of this study was to assess the effect of different irrigation strategies in virgin olive oil (VOO) composition and quality of cv. Cobrançosa, integrated in a protected denomination of origin of "Azeite de Trás-os-Montes" in the Northeast of Portugal. Three irrigation treatments were applied: T2-full irrigation that received a seasonal water equivalent to 100% of estimated crop evapotranspiration (ET c ), T1-continuous deficit irrigation (30% ET c ) and T0-rainfed treatment. Data were collected from two consecutive crop years (2005)(2006). Irrigation regimes had a minor effect on standard quality indices (free fatty acids, peroxide value, K 232 and K 270 ) of VOO and in fatty acid composition. Total polyphenols decreased up to treatment T2, and were strongly related to the water stress integral, suggesting that the effect of irrigation on this variable occurs along the crop season and not just during the oil accumulation phase. A strategy of continuous deficit irrigation with only 30% of maximum ETc may have an advantageous effect, as it increased oil yield to more than double that of rainfed conditions while VOO quality was similar.

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Influence of different irrigation regimes on crop yield and water use efficiency of olive

Cited by 79 publications

References 42 publications

Summer deficit-irrigation strategies in a hedgerow olive orchard cv. ‘Arbequina’: effect on fruit characteristics and yield

Summer deficit-irrigation strategies in a hedgerow olive orchard cv. ‘Arbequina’: effect on fruit characteristics and yield

Estimation of Energy Balance Components over a Drip-Irrigated Olive Orchard Using Thermal and Multispectral Cameras Placed on a Helicopter-Based Unmanned Aerial Vehicle (UAV)

Effect of different irrigation regimes on the quality attributes of monovarietal virgin olive oil from cv. “Cobrançosa”

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